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y were __________. The history of potato chips Listen again. Complete the sentences. by mistake 意為 “錯誤地,無意地” . I took his backpack by mistake. 我錯拿了他的書包。 He put salt in her cup of tea by mistake. 他錯把鹽放進她的茶里。 2c Role play the conversation of potato chips. Use the information from 1c to 1d. A: Did you know potato chips were invented by mistake? B: Wow, I didn’t know that. Who invented them? A: … Do you know when basketball was invented? Do you likebasketball? Do you watch basketball games? How much do you know about this sport? ? Who was it invented by? ? When was it invented? Equipment